I wanted to share my 6-card draft so far for Ankh-Theb. I liked the death and rebirth theme that was present in most of the round 2 pitches, which I interpreted with Mummify, a persist-like mechanic where you return the same size but with no abilities. Mummify plays well with Offering, brought back in Nich's pitch. Here Offering is used to entreat visits from lesser gods. Pyramid Laborer is taken from the single-card designs on the wiki, I like how the creature provides you with a bonus when it goes and does work for you.

Pharaoh's Cat 1W
Creature - Cat
Lifelink
Mummify (when this dies, return it to the battlefield with a mummified counter and no abilities.)
1/2

Temple Guardian 3W
Creature - Human Warrior
Defender
Mummify (when this dies, return it to the battlefield with a mummified counter and no abilities.)
2/4

Lesser Sun God 6W
Creature - Spirit
~ may block an additional creature.
White creature offering (you may cast this card any time you could play an instant by sacrificing a White creature and paying the difference in mana costs between this and the sacrificed creature. Mana cost includes color.)
3/6

Spirit Voyage W
instant
Exile target creature you control. At the beginning of the next end step, return that card to the battlefield under its owner's control.

Here's my submitted round 3 pitch for Ankh-Theb (The original draft can be seen by clicking Show First Draft above). Offering was not working out, and has been removed.

Set: Ankh-Theb

Pitch Name: The Mummy Returns

Mechanical Themes: WBR desert society, with Mummify and Exiling creatures from graveyards as a cost. GU river society, with Cyclic growth ("Thallid" mechanic).

50 Words:
The path to the afterlife is getting harder to achieve. Instead of finding peace, the recently deceased are returning as undead husks of their former selves. Some blame the secularization of the river society, who forgo the gods for bountiful life on earth. Others blame the cultists who desecrate the dead.

Pharaoh's Cat 1W
Creature - Cat
Lifelink
Mummify (When this dies, return it to the battlefield with a mummified counter and no abilities. It's a zombie in addition to its other types.)
1/2

Love the first three cards (except a tiny Vorthos niggle that wonders if this civilization will mummify anyone and anything)

Torn on bringing back Offering. Flavor-wise, it fits (though it would fit a bit better in a Mayan world); I'm just not sure it was a great mechanic to begin with. I will say that I want a more impressive body for a god, even a lesser one.

I like the activation cost of Temple, and the whole package makes flavor sense, but it's not at all clear why I'd want to pay so much just to empty a graveyard (compare to Relic of Progenitus or Tormod's Crypt), or to mess with it at all. Are we assuming that black is keeping the spend-creatures-from-graves motif?

I am a little bit worried about Offering as well. It has five lines of text and an odd granting of Flash to the card and it's kind of hard to use at lower rarities. Lesser Sun God is supposed to be a good blocker to flash in with offering, letting you block two creatures and hopefully kill one, but it feels rather underwhelming when you're paying 6W for it.

For the Temple, I was going off of Steamclaw from Odyssey and Moratorium Stone, both of which also let you choose which card to exile. I envisioned it as a way to combat black's spend-from-the-grave and Mummify, though it's not clear if most players would know that you can exile the creature with the mummify trigger on the stack.

My understanding was that even the Middle and Lower classes in ancient Egyptian society (cheaply) mummified their dead. The process was not as ritualized, and mostly entailed letting the body dry out in the sand.

And of course, there are stories of the elite having their servants and pets sacrificed, mummified, and entombed with them.

I think Offering at common is not really feasible. To be honest, I have no idea why they keyworded it to begin with- it has only ever been used on that one cycle.

I think they were still finding their footing about how much keywording should happen. Epic and Sweep were in the same block and I suspect they didn't really figure that out until after Lorwyn/Shadowmoore's Hideaway (Ravnica and Time Spiral blocks, by their nature, obviated the problem).